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Finding the Fourth Proportional to 654,363.68, 981,148.96 and 426,829.28

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Solution

The fourth proportional to 654,363.68, 981,148.96 and 426,829.28 is: 639,985.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    654,363.68 : 981,148.96 = 426,829.28 : x
  2. Step 2: Convert to fraction form
    654,363.68/981,148.96 = 426,829.28/x
  3. Step 3: Cross multiply
    654,363.68x = 981,148.96 × 426,829.28
  4. Step 4: Simplify right side
    654,363.68x = 418,783,104,169.55
  5. Step 5: Solve for x
    x = 418,783,104,169.55/654,363.68
  6. Step 6: Final answer
    x = 639,985.25

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.